Device for bending iron rods



Oct. 16, 1928.

A. WAGENBACH DEVICE FOR BENDING IRON RODS Filed April 30, 1926 Patented Oct. 16, 1928.

' ".ANToN wirsnuiaaoa or ntnnnrjntn, ennMnnY.

nnv'icnronrnnnme,rnoN nous. 1

Application filed April 30, 19%, Serial No. 105,840, an d in. Germany November ."18,'192t.

The invention relatesto a device for bend-v ing iron rods of such a form that circular bendings of diameters up to thelargest can be made by substituting a roll with cramping-teeth instead of the usual bendinglever and by arranging on the ground l'plate supplen'ientary rolls in such a way-the deviceworks 'in the fashion of a three roll bending .ma-. chine. Thereby the addition of simple and no cumbersome auxiliary-pints notjonly en ables the machine to bend iron to angular.

shapes, as for example concrete iron rods, but also to bend iron rods for every possible purpose.

The invention further concerns special appliances enabling the bending rolls to be arranged at difierent heights, so that screwlike bendings can be obtained. Therebythe' machine can be used for making screw springs, or screwlike rods for concrete pipes, or for bending conical screw spirals, the possibilities of use thus being practically unlimited.

I The drawing shows the new machine,

Fig. 1 being a perpendicular section the head part of the machine,

Fig. 2 a top View, and

Fig. 3 a side view of one of the roll arrangements.

A main frame, usually placed on running wheels, and fitted with a motor and gear, which is not shown for matter of simplicity, carries at a handy height an upper frame 3 with a bearing plate 4t and with a bending shaft 5, passing througl'i the middle of said plate .4 and adapted to bedriven by motor force. Instead 'of the bending-lever used for angular bendings, on the bending shaft 5 a toothed cramping roll 6 is placed. which holds and moves by, itsteeth or points the iron rod to be bent.

' In the bearing plate i holes provided which are used forfastening counter bearings serving as abutments for the iron to be bent, and which in this case are used for carrying slide beds 25, in which slides 26 with rolls 28 are arranged, and adjusting spindles 27 are placed for moving said slides. As visible in Fig. 2, the rolls 28, by being displaced, allow the bending of a straight iron'rod (shown by. full lines), with every radius of curvature from the largest down to the smallest (shown by dotted lines) in such a way, that the rod while beingpassed lengthwise by the toothed cramping roll 6 conthe essential parts of tinually is bent with the prescribed radius,

By adjusting thespindles27g duringithe bending process plane spirals or any curvatures with variable radii can bef producedj, .E l' bending iron rods an auxiliary roll 46 iis for. surely operating on different sizes of re ds.

-usefullyemployed, which presses the iron rod against the toothed. roll 6 and. 'maybe ad- 'justed, or chosen with an adapted diameter,

.65 1 One of the rolls28 is provided with a second ;ri.1n;.28 situated higherthan the first rim and givingtherebyto the 'iron'rod asiniub For preventing'of bending and twisting bent part of. the rod. The rolls 4:0, in conse uence of their reat len 'th extendin over C b D the center pin 42 can'be easily adjusted'in such a way, that differently bent iron rods run over the roll, in a correct direction, so as to meet the least resistance of movement.

For bearing a rod with large bendings a beam L4: with a slot is provided along the bearing plate 4; in such a way, that the rolls 40, by aid of clamping screws passed through said slot, can be placed on any spots. Thereby the rod to be bent can be surely supported at practically'every diameter.

I claim:

1. A device forbending iron rods, comprising in combination a substantially horizontalbearing plate, a substantially vertical bending shaft extending through said hearing plate, a cramping roll fastened to said shaft above said plate, and adjustable rolls adapted to be fastened to said plate, one of \x... we

said adjustable rolls being provided with means for holding the iron red at different helghts, as for instance with morethan onev guiding groove in its circumference. I

2. A device for bending iron rods, comprising in combination a substantially horizontal bearing plate, provided With perform tions, a substantially vertical bending shaft extending through said bearing plate, a cramping roll fastened to said shaft above said plate, a slide bed provided With means adapted'to be inserted into said perforations,

' aslide in said-bed, a spindle on said bed for displacing said slide and a roll on said slide. 3. A device for bending iron. rods, compr1singin combination a substantiallyhorizontal ed to be fastened to said plate, turnable parts adapted to be fastened to said plate, horizontalsupporting rolls mounted on said turnable parts and counter rolls mounted on said turnable parts parallel to said supporting rolls and adj ustable in height.

4. A device for bending iron rods, co1nprising in combination a substantially horizontal bearing plate, a substantially vertical bending shaft extending through said bearingplate, a cramping roll fastened to said shaft above saidplate, vertical bending rolls adapted to be fastened to said plate, 'turnable parts adapted to be fastened to said plate, horizon-' tal supporting rolls mounted on said turnable parts and a slotted supportingbeam on the edge of said plate for fastening said turnable par-ts.

In Witness whereof I affix mysignature;

ANTON XVAGENBACH. 

